One watch event will be sent to the client when the data has changed. Forexample, if a client does a getData("/znode1", true) and later the data for/znode1 is changed or deleted, the client will get a watch event for/znode1. If /znode1 changes again, no watch event will be sent unless theclient has done another read that sets a new watch.

I know zk server will notify it's znodes watcher. But i mean will zookeeperserver merge some watcher notifications when client update data of znode *frequently*!

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2011/11/4 Andrei Savu <[EMAIL PROTECTED]>

> Check this page:>> http://zookeeper.apache.org/doc/r3.3.3/zookeeperProgrammers.html#ch_zkWatches>> *One-time trigger*>> One watch event will be sent to the client when the data has changed. For> example, if a client does a getData("/znode1", true) and later the data for> /znode1 is changed or deleted, the client will get a watch event for> /znode1. If /znode1 changes again, no watch event will be sent unless the> client has done another read that sets a new watch.>> On Fri, Nov 4, 2011 at 10:43 AM, nileader <[EMAIL PROTECTED]> wrote:>> > Will zookeeper server merge some watcher notifications when client update> > data of znode frequent!> >>